<?php
/**
 * Batch 40 — Polylang tools via its public template functions. Net-new, GPL-2.0-or-later. See NOTICE.md.
 * Inert unless Polylang (POLYLANG_VERSION) is active.
 */

namespace AskTamMCP\Extensions;

defined('ABSPATH') || exit;

class Batch40 {

    public static function register($registry): void {
        if (!defined('POLYLANG_VERSION')) return;

        $def = function (string $name, string $desc, array $props, array $required, string $scope, string $method) {
            $schema = ['type' => 'object', 'properties' => $props ?: new \stdClass()];
            if ($required) $schema['required'] = $required;
            return ['name' => $name, 'description' => $desc, 'scope' => $scope,
                    'handler' => 'AskTamMCP\\Extensions\\Batch40::' . $method, 'inputSchema' => $schema];
        };

        $registry->register($def('polylang_detect', 'Report whether Polylang is active, its version, and the default language.', [], [], 'read', 'detect'));
        $registry->register($def('polylang_list_languages', 'List Polylang languages (slug) and the default.', [], [], 'read', 'listLanguages'));
        $registry->register($def('polylang_get_post_language', 'Get the language slug of a post.',
            ['post_id' => ['type' => 'integer']], ['post_id'], 'read', 'getPostLanguage'));
        $registry->register($def('polylang_get_translations', 'Get the translation post ids of a post, keyed by language slug.',
            ['post_id' => ['type' => 'integer']], ['post_id'], 'read', 'getTranslations'));
    }

    public static function detect(array $args): array {
        return ['active' => defined('POLYLANG_VERSION'), 'version' => defined('POLYLANG_VERSION') ? POLYLANG_VERSION : null,
            'default' => function_exists('pll_default_language') ? pll_default_language() : null];
    }

    public static function listLanguages(array $args): array {
        $langs = function_exists('pll_languages_list') ? pll_languages_list() : [];
        return ['count' => count((array) $langs), 'languages' => array_values((array) $langs),
            'default' => function_exists('pll_default_language') ? pll_default_language() : null];
    }

    public static function getPostLanguage(array $args): array {
        $id = (int) ($args['post_id'] ?? 0);
        $lang = function_exists('pll_get_post_language') ? pll_get_post_language($id) : null;
        return ['post_id' => $id, 'language' => $lang];
    }

    public static function getTranslations(array $args): array {
        $id = (int) ($args['post_id'] ?? 0);
        $tr = function_exists('pll_get_post_translations') ? pll_get_post_translations($id) : [];
        return ['post_id' => $id, 'translations' => (array) $tr];
    }
}